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NASA Scientists Reveal New Information on Mars’ Formation and Evolution, Claim The Red Planet has a Porous Crust

NASA scientists claim the new revelations could help them better understand the interior structure and evolution of Mars

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Access Mars
Google collaborated with NASA to produce Access Mars that lets users wander the actual dunes and valleys explored by NASA's Curiosity rover.. Wikimedia
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Washington, Septemeber 15, 2017 : Mars’s crust is not as dense as previously thought and a lower density likely means that at least part of the Red Planet’s crust is relatively porous, says a new NASA study.

The findings, published in the journal Geophysical Research Letters, provide researchers clue that could help them better understand the interior structure and evolution of Mars.

“The crust is the end-result of everything that happened during a planet’s history, so a lower density could have important implications about Mars’s formation and evolution,” said study lead author Sander Goossens of NASA’s Goddard Space Flight Center in Greenbelt, Maryland.

The researchers mapped the density of the Martian crust, estimating the average density is 2,582 kgs per metre cubed. That’s comparable to the average density of the lunar crust.

Typically, Mars’s crust has been considered at least as dense as Earth’s oceanic crust, which is about 2,900 kgs per metre cubed.

The new value is derived from Mars’s gravity field, a global model that can be extracted from satellite tracking data using sophisticated mathematical tools.

Previous estimates relied more heavily on studies of the composition of Mars’s soil and rocks.

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“As this story comes together, we’re coming to the conclusion that it’s not enough just to know the composition of the rocks,” study co-author Greg Neumann, a planetary geologist at Goddard, said.

“We also need to know how the rocks have been reworked over time,” Neumann said.

Goossens and colleagues started with the same data used for an existing gravity model but put a new twist on it by coming up with a different constraint and applying it to obtain the new solution.

A constraint compensates for the fact that even the best data sets can’t capture every last detail.

Instead of taking the standard approach, known to those in the field as the Kaula constraint, the team created a constraint that considers the accurate measurements of Mars’s elevation changes, or topography.

“With this approach, we were able to squeeze out more information about the gravity field from the existing data sets,” said Goddard geophysicist Terence Sabaka.  (IANS)

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Kalpana Chawala: The Woman Who Made The Difference

Kalpana’s dream break to fly in space came in November 1997, aboard the space shuttle Columbia on flight STS-87

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The forename Kalpana denotes
The forename Kalpana denotes "idea" or "imagination." Wikimedia Commons
  • Kalpana Chawla continues to be an inspirational force for youth all-over, especially girls
  • Kalpana Chawla earned a doctorate in aerospace engineering from the University of Colorado in 1988
  • In the year 2000, Chawla was selected for her second voyage into space, serving again as a mission specialist on STS-107

Kalpana Chawala is one of the inspiring personality and an Ideal for numerous people, it’s been 18 years since her passing, but Indo-American astronaut, Kalpana Chawla continues to be an inspirational force for youth all-over, especially girls. Born in Karnal-Punjab, Kalpana overcame all odds and fulfilled her dream of reaching for the stars.

Kalpana achieved a grade in aeronautical engineering from Punjab Engineering College before immigrating to the United States and becoming a naturalized citizen in the 1980s. She earned a doctorate in aerospace engineering from the University of Colorado in 1988, having previously obtained her master’s degree from the University of Texas. She began working at NASA’s Ames Research Center the same year, working on power-lift computational fluid dynamics.

In 1994, Kalpana was selected as an astronaut candidate. She was appointed as a crew representative for the Astronaut Office EVA/Robotics and Computer Branches after a year of training, where she worked with Robotic Situational Awareness Displays and tested software for the space shuttles.

kalpana chawala’s Death was a very uncertain demise of one of the finest astronaut the world ever had.

In 1988, Kalpana’s dream of joining NASA finally came true. Wikimedia Commons
In 1988, Kalpana’s dream of joining NASA finally came true. Wikimedia Commons

Early life: Kalpana Chawala was born on March 17, 1962, in Karnal, Haryana. Born into a middle-class family, she completed her schooling from Tagore Baal Niketan Senior Secondary School, Karnal and her B.Tech in Aeronautical Engineering from Punjab Engineering College at Chandigarh, India in 1982.

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Kalpana Chawala was the youngest of four children in her family. The forename Kalpana denotes “idea” or “imagination.” Her full name is pronounced CULL-puh-na CHAV-la, though she often went by the nickname K.C.

Journey in the United States: To fulfil her desire of becoming an astronaut, Kalpana aimed to join NASA and moved to the United States in 1982. She obtained a Master’s degree in Aerospace Engineering from the University of Texas at Arlington in 1984 and a second Master’s in 1986. She then earned a doctorate in aerospace engineering from the University of Colorado at Boulder.

Wedding bells: There’s always time for romance. In 1983, Kalpana tied the knot with Jean-Pierre Harrison, a flying instructor and an aviation author.

Work at NASA: In 1988, Kalpana’s dream of joining NASA finally came true. For the position of Vice President of Overset Methods, Kalpana Chawala was appointed at NASA Research Center and was later assigned to do Computational fluid dynamics (CFD) research on Vertical/Short Takeoff and Landing concepts.

Kalpana’s dream break to fly in space came in November 1997, aboard the space shuttle Columbia on flight STS-87. The space shuttle made 252 orbits of the Earth in just over two weeks. The space aircraft completed a number of experiments and observing tools on its trip, including a Spartan satellite, which Chawla deployed from the shuttle. The satellite, which studied the outer layer of the sun, malfunctioned due to software errors, and two other astronauts from the shuttle had to perform a spacewalk to recapture it.

Also Read: Facts about Miss Universe 2017, Manushi Chhillar you didn’t know before

Kalpana Chawala Rocket Crash

In the year 2000, Chawala was selected for her second voyage into space, serving again as a mission specialist on STS-107. The mission was delayed several times and finally launched in 2003. Over the course of the 16-day flight, the crew completed more than 80 experiments.

In 1994, Chawla was selected as an astronaut candidate. She was appointed as a crew representative for the Astronaut Office EVA/Robotics and Computer Branches after a year of training. Wikimedia Commons
In 1994, Chawla was selected as an astronaut candidate. She was appointed as a crew representative for the Astronaut Office EVA/Robotics and Computer Branches after a year of training. Wikimedia Commons

On the morning of Feb. 1, 2003, the space shuttle returned to Earth, intending to land at Kennedy Space Center. At launch, a briefcase-sized piece of insulation had broken off and damaged the thermal protection system of the shuttle’s wing, the shield that protects it from heat during re-entry. When the aircraft moved through the atmosphere, hot gas streaming into the wing caused it to break up. The unstable craft rolled and bucked, pitching the astronauts about. Less than a minute passed before the ship depressurized killing the crew. The shuttle broke up over Texas and Louisiana before plunging into the ground. This incident was the second major disaster for the space shuttle program, following the 1986 explosion of the shuttle Challenge.

In the disastrous damage of the space shuttle, Columbia took the lives of seven astronauts. One of those, Kalpana Chawla, was the first Indian-born woman in space.